Spring-driven motor



Patented Sept. 14, 1926.

UNITED STATES PATENT orric ALBERT I. HODGE, OF WINSTED, CONNECTICUT, AssIGNOR To WILLIAM L. GILBERT CLOCK COMPANY, or WINsTnD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

srnING-naIvnN MOTOR.

Application led` November, 1924. Serial No. 747,459.

My invention relates to spring driven motorsy such as motors for clocks and the like, where it is desirable to be able to replace a. broken spring without disassembling the mechanism of the motor as a whole and has for itsobject to provide a new and improved means for accomplishing this result without disturbing the adjustment of the parts of the train other than the spring arbor and members carried thereby. It further has for its Object to provide novel means for securing a spring end and arbor bear- 1n s. f

lgln clocks as ordinarily made at present,

it has been necessary when making any repairs that necessitated the removal of the main wheel, arbor or spring, to take the movement apart as a whole and then after making the repairs to reassemble all the parts and re-adjust, as in re-assembling all parts would not be in exactly the same adjustment as they were previously. Such disassembling and re-assembling and adjustment calls for the expenditure of considerable time by a skilled employee and the corresponding expense which expenditure of time and expense it is the object of my invention to substantially eliminate in a simple manner. The following is a descriptiono't an embodiment of my invention reference being had to the accompanying drawings, in which,- y

Figure l shows parts of a spring driven motor having two main spring arborsand :$5 springs and embodying my invention in connection with each of said arbors;

Fig. 2 is a section on the line 2-2 of Fig. l; while Fig. 3 is a right hand side elevation of 4.0 the mechanism shown in Fig. l, parts being broken away.

Referring more particularly to the drawings, '2-2 are front and rear plates of a spring driven motor. Each plate is provided `with a lateral slot A4 extending inwardly from a side of the frame and having parallel sides. V'Vithin these slots are bushings 6-6 provided with circumferential grooves of the same width as the thickness of the 60 plates and forming necks of the same diameter as the width of the slots -in the plates so that the bushings can be slid in and out of the slots. Since the plates t the grooves the bushings whenwithin the slots are held from endwise movement. Removably connected to the frames are two bridge men'ibers 8-8. These bridge members are secured to the frames by'screws 10V-Mld. The bridge members are 'provided with eyelets 12-12 on which are inwardly extending lateral projections 14-14 approximately parallel with the sides of the grooves Lft-4, the screws l() passing through the ends ot said projections. The eyelets 121Q emA brace the round external ends oit the `bushings Gmt and thus hold them fixed within the slots simil. 16 is a spring arbor carrying the main wheel 18 and the driving spring- 20 together with the ratchet wheel Q2, these parts except as hereinafter speci` lied being ot ,ordinary construction, and is provided with shoulders Q4 engaging the inner faces ot the bushings.

The end of each spring is provided with a hook 2G which is riveted to the spring at 28 being bent backward at 30 so that the end 32 of the spring blocks or closes the mouth of the hook sufficiently to retain therein a post such as the pillar 3ds of the trame, as shown. The plane ot the end portion of the spring is preferably approximately in line with a radius oit the post 34, this being attained by the proper bending back yoi the hook at the pointed n Then 1t becomes necessary. to remove the main arbor, the bridges S are removed and the bushings @#6 are slid sideways through the notches drei, the end of the spri g being released from the post by depressing the tongue 32 and unhooking. After, the ifepairs, such for instance the placing ou the arbor ol a new spring restrained by the ordinary clamp has been carried out, the bushings are applied to the ends of the or bor and are slipped in place whereupon the bridges SMS are secured in place, the hoolr 2G being snapped upon the post Si and retained thereon by the `flexible `tongue The spring is then wound up suiiiciently to permit removal of the clamp and the repair job is thus completed without disassembling the parts or changing their relation so as to require subsequent adjustment of the mechanism. In the drawings the right hand portion of Fig. 1 shows the parts in front elevation, while the left hand portion of Fig.

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